Answer to Question #104149 in General Chemistry for Isabella

Question

Calculate the total amount of energy needed to change 2.57 g of water from an original temp of -73.2 C to a final temperature of 221 C.

Answer 1

E_x=C_xm_x$\Delta$T

E = E_-73.2/0 + E_melt + E_0/100 + E_vap + E_100/221 = 2.57 × 18.103 × 73.2 + 2.57 × 335.105 + 2.57 × 4.220 × 100 + 2260 × 2.57 + 2.57 × 2.000 × 221 = 12259 J = 12.26 kJ